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Airborne radiotelephone communications system

  • US 5,519,761 A
  • Filed: 07/08/1994
  • Issued: 05/21/1996
  • Est. Priority Date: 07/08/1994
  • Status: Expired due to Term
First Claim
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1. A communications system comprising:

  • an airborne based subsystem for transmitting radio signals to, and receiving communication signals having a quality level from, a first base station of a plurality of base stations in a ground based subsystem, and if the quality level of said first base station'"'"'s communication signal is less than a predetermined amount, transmitting the radio signals to, and receiving the communication signals from, a second base station of said plurality of base stations, the airborne based subsystem comprising;

    an airborne radio for originating the radio signals and receiving the communication signals, and selecting the second base station in response to the quality level of the second base station'"'"'s communication signal; and

    an airborne radio repeater for relaying the radio signals from the airborne radio to the ground based subsystem and for relaying the communication signals from the ground based subsystem to the airborne radio;

    the ground based subsystem being coupled to a public switched telephone network (PSTN) and having at least one upward radiating antenna for transmitting the communication signals and receiving the radio signals.

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